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How do I count a JavaScript object's attributes? [duplicate]
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why don't you just do foo.hasOwnProperty(k). Am I missing something? I mean even JavaScript type derives from Object.prototype, and it will have a hasOwnProperty() method.
– bucabay
Aug 28 '...
Segue to another storyboard?
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Yes, but you have to do it programmatically:
// Get the storyboard named secondStoryBoard from the main bundle:
UIStoryboard *secondStoryBoard = [UIStoryboard storyboardWithName:@"secondStoryBoard" bundle:nil];
// Load the initial view controll...
Python dictionary from an object's fields
Do you know if there is a built-in function to build a dictionary from an arbitrary object? I'd like to do something like this:
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Why do I get “a label can only be part of a statement and a declaration is not a statement” if I hav
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The language standard simply doesn't allow for it. Labels can only be followed by statements, and declarations do not count as statements in C. The easiest way to get around this is by inserting an empty statement after your label, which relieves you fro...
How to Correctly Use Lists in R?
...that really points out the difference between a list and vector in R:
Why do these two expressions not return the same result?
x = list(1, 2, 3, 4); x2 = list(1:4)
A list can contain any other class as each element. So you can have a list where the first element is a character vector, the second ...
Do DOM tree elements with ids become global variables?
...appen is that ‘named elements’ are added as apparent properties of the document object. This is a really bad idea, as it allows element names to clash with real properties of document.
IE made the situation worse by also adding named elements as properties of the window object. This is doubly b...
How to push different local Git branches to Heroku/master
...er:
git config remote.heroku.push +HEAD:refs/heads/master
Also, you can do this directly with git push:
git push heroku +HEAD:master
git push -f heroku HEAD:master
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How do I connect to a specific Wi-Fi network in Android programmatically?
.... String should contain ssid in quotes
Then, for WEP network you need to do this:
conf.wepKeys[0] = "\"" + networkPass + "\"";
conf.wepTxKeyIndex = 0;
conf.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE);
conf.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.WEP40);
For WPA netw...
What is the best way to repeatedly execute a function every x seconds?
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If your program doesn't have a event loop already, use the sched module, which implements a general purpose event scheduler.
import sched, time
s = sched.scheduler(time.time, time.sleep)
def do_something(sc):
print("Doing stuff...")
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To ARC or not to ARC? What are the pros and cons? [closed]
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There is no downside. Use it. Do it today. It is faster than your old code. It is safer than your old code. It is easier than your old code. It is not garbage collection. It has no GC runtime overhead. The compiler inserts retains and re...